SPDT/sapl: Sistema de Apoio ao Processo Legislativo - sapl

Sistema de Apoio ao Processo Legislativo

Edward Ribeiro 2f2a976dfa Add Redis-backed rate limiting, anonymous caching, and nginx Lua IP-block layer Implements a multi-layer DDoS/abuse mitigation stack across nginx, Django middleware, and Redis: nginx hardening (Phase 0) - GeoIP2 ASN-based bot blocking (MaxMind GeoLite2-ASN, offline build) - Request-rate and connection-rate limit zones; scanner probe zones - Gunicorn worker/timeout tuning; N+1 query fix in relatorio views - X-Accel-Redirect for private /media/ files; nginx internal media path Redis infrastructure (Phase 1) - Shared Redis pod for cross-pod state (k8s manifests: Deployment, Service, ConfigMap) - Django dual-backend cache: default (file/Redis) + dedicated `ratelimit` Redis DB 1 - configure_redis_cache() wired into settings startup; KEY_PREFIX namespace isolation RateLimitMiddleware (Phase 2) - Per-IP request rate counter (60/min sliding window) → block key in Redis DB 1 - Per-IP 404-scan counter and UA Redis deny list - NAT-aware: blocks authenticated users behind a shared blocked IP - Scoped API rate limit (60/min) with daily/weekly quota per consumer - IP-prefix blocklist (SET `rl:ip_prefix:blocked`) with 4-candidate SMEMBERS check - Blocked-IP ZSET indexes with inline pruning; atomic block writes via Lua script - Returns 403 for prefix-list hits, 429 for rate/quota hits - Django block metrics tracked per layer; CORS headers on 429 responses - Collapse rl:metrics STRING keys into a HASH per tenant per day Anonymous page caching (Phase 4) - AnonCachePageMixin applied to 8 public search/filter views (materia, sessao, pesquisar-sessao, comissoes, norma, audiencia, relatorios) - Mitigates pesquisar-sessao DDoS; sanitises page= param pollution - ETag/Last-Modified conditional request support on norma and media views nginx Lua early-rejection layer - `blocklist.lua`: per-request access_by_lua_file hook — checks shared dict for prefix matches (zero Redis I/O), then pipelines GET rl:ip:{ip}:blocked + GET rl:api:ns:{ns}:ip:{ip}:blocked; returns 429 before Gunicorn is reached - `init_worker_by_lua_block`: 60s timer refreshes `ngx.shared.ip_prefix_blocked` from Redis SMEMBERS; fail-open on Redis error - Uses `libnginx-mod-http-lua` + `libnginx-mod-http-ndk` (Debian Bookworm dynamic modules); load order in nginx.conf: NDK → GeoIP2 → Lua - `resty_redis.lua` vendored (lua-resty-redis is not in Debian Bookworm repos) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>		1 month ago
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dev-requirements.txt	Atualização da imagem base Docker (#3787)	11 months ago
migration-requirements.txt	Enumera matérias a serem apagadas de proposições ao ressucitar deps	8 years ago
requirements.txt	Add Redis-backed rate limiting, anonymous caching, and nginx Lua IP-block layer	4 weeks ago
test-requirements.txt	Atualização da imagem base Docker (#3787)	11 months ago